I feel there is a use case for extra spaces in answers and messages. I would use it to represent blockquotes in messages, since they don't get any of the forums formatting features. Still I'd imagine it's great for other workarounds or those that want to write academic papers on here.

Still, answers and messages don't get those formatting features regardless. If answers and messages get all the forum post formatting features I probably wouldn't have made this post at all. Still, that seems more complex than adding one